Concrete insert



Dec. 13, 1966 P. c. SHERBURNE 3,290,851

CONCRETE INSERT Filed Aug. 12, 1963 2 Sheets-$heet 1 INVENTOR.

PHILIP C. SHERBURNE iwaflrla" ATTORNEY United States Patent 3,290,851 CONCRETE INSERT Philip C. Sherburne, East Providence, R.I., assignor t0 Grinnell Corporation, Providence, R.I., a corporation of Delaware Filed Aug. 12, 1963, Ser. No. 301,445 3 Claims. (Cl. 52701) This invention relates to improvements in devices for anchoring pipes or similar building accessories to concrete building structures. More particularly, it relates to a noise and vibration isolating anchoring device in a category of devices known in the art as concrete inserts.

In present day practice the use of concrete inserts during the construction of a concrete building has found widespread acceptance in lieu of the former practice of drilling holes in the hardened concrete and utilizing ex pansion anchors to retain pipe hangers and the like in place. The engineering refinements in modern concrete construction have made it possible to use thinner floors, walls and ceilings than were previously considered acceptable. As a result, it has been found that the occupants of these new buildings are more susceptible to noise and vibration transmitted from the building utilities, than was the case in concrete buildings built many years ago. In addition, whether in a building of aged or recent vintage, transmitted vibrations might be the cause of loosening of the supporting elements. Some of the sources of noises and vibrations which I have referred to are water hammer in pipes, expansion and contraction in heating and cooling systems, and air movement in ducts.

The present invention provides an effective means for dispelling the noise and vibration transmitted through supports and is quickly and easily installed so as to become an integral part of a concrete structure.

The annexed drawings and specification disclose one embodiment of the invention. The novel features will be particularly pointed out in the disclosure and the appended claims.

In the drawings:

FIG. 1 is a sectional elevation view of the separated components of the device, set in place in concrete, as they appear viewed along line 1-1 of FIGS. 4 and FIG. 2 is a sectional view similar to FIG. 1 showing the components joined together and fastened to a ceiling form prior to the pouring of concrete;

FIG. 3 is a view similar to FIG. 2 with the form removed after the concrete has set.

FIG. 4 is a plan view of the hanger anchor member alone as seen from line 4--4 of FIG. 1, with the concrete removed.

FIG. 5 is a plan view of the retainer member as seen from line 55 of FIG. 1.

The two princpal elements of the combination are indicated generally by the numerals 6 and 7.

The number 6 indicates the hanger anchor member. This member contains a frustro-conical outer shell 11 having an outwardly extending circumferential flange 13 at the broadest end portion of the shell and an inwardly directed rim 15 at the opposite narrower end of the shell. The interior of the shell is filled with an elastomer 17 such as natural or synthetic rubber.

Floating in the elastomer completely independent of the shell 11 is a threaded socket member 21. The top of this member is shown as hexagonal in plan view to give increased retention against rotation in the rubber and has a cover plate 23 fastened on its top by welding or brazing to prevent a hanger rod from being screwed too far into the support and thus tearing the elastomer filling which also covers the top of the socket member. The threads 25 in hole 26 serve the twofold purpose of supporting a hanger Patented Dec. 13, 1966 rod (not shown) from which a pipe or conduit is sup ported, and of being the means by which the hanger anchor member 6 is joined to a hold-down or retainer member 7.

The retainer member has a flat circular flange portion 30 through which spaced holes 32 are punched. Rising from the center of the flange portion is a cylindrical plug 34 on which threads 36 are formed. These threads correspond to the threads 25 formed in the socket member. The plug may be hollow, as shown, or solid, depending on the manner of manufacture.

In practice, nails, such as 40, are driven through the holes 32 into a wooden concrete form 45 to hold the retainer member 7 in place. Should metal for-ms be used instead of wooden ones, an appropriate adhesive may be used in place of the nails. After fixing the retainer member in place, the hanger anchor member 6 is threaded onto the retainer, as shown in FIG. 2. This not only places the anchor member in proper position, but due to the presence of the plug 34, also prevents the entrance of concrete, during pouring, into the opening 26. The concrete is then poured. After it has set, the forms are removed (see FIG. 3) and the retainer member 7 unscrewed (see FIG. 1) leaving the anchor member 6 in place, ready to receive a threaded hanger rod.

It will be seen that the socket member 21 makes no direct contact with either the shell 11 or the concrete structure due to the surrounding presence of the elastomer 17. Consequently, any noise or vibration transmitted to the socket member 21 will be dampened before it can reach the shell 11 and the surrounding concrete.

Having described one embodiment of the invention it will be understood that various changes may be made by those skilled in the art within the principle and scope of the invention as expressed in the appended claims.

I claim:

1. An anchoring device for use in concrete construction comprising: a frustro-conical metal shell member having a large open end and a small open end, a socket member within said shell member adjacent said small end having an internally threaded opening in alignment with said large and small open ends and directed toward and substantially even with said small end, a cover plate joined to said socket member over said opening at the end directed toward said large open end of said shell member, an elastomer material covering said socket member and said cover plate and plugging said large open end and interposed between said shell member and said cover plate and socket member, and a removable external plate member having a central threaded plug engageable with the internal threads of said socket member.

2. An anchoring device for use in concrete construction comprising: a frustro-conical metal shell member having a large open end and a small open end, a circumferential outwardly extending flange joined to said shell at said large open end, an inwardly directed circumferential rim joined to said shell at said small open end, a socket member within said shell adjacent said rim having an internally threaded opening centrally aligned with said large and small open ends and directed toward the small open end of said shell, a cover plate united with said socket member over said opening at the end directed toward said large open end of said shell member, an elastomer material completely plugging said large open end of said shell over said cover plate and said socket member and interposed between and completely separating said shell and said cover plate and socket member, and a removable external plate member having a central threaded plug engageable with said threaded opening in said socket member.

3. An anchoring device anchored in a. concrete ceiling comprising: a frust'ro-conical metal shell member emtending upwardly within said concrete and a small open end extending downwardly and exposed at the exterior of said concrete ceiling, a circumferential outwardly extending flange joined to said shell at said large open end, an inwardly directed circumferential rim joined to said shell at said small open end, a socket member within said shell adjacent said inwardly directed rim having an internally threaded opening at its lower end directed upwardly from said small open end of said shell, a cover plate united with said socket member over said upper end of said threaded opening, an elastomer material over said socket member and said cover plate filling said large open end even with said flange and interposed between said socket member and cover plate.

References Cited by the Examiner UNITED STATES PATENTS 9/1913 Rickman 52699 11/ 1947 Devorss 24822 l/1951 Saurer 24822 2/1962 Rohe 52-708 7/1965 Wallerstein 52698 FOREIGN PATENTS 3/1923 Great Britain. l/l962 Great Britain.

RICHARD W. COOKE, JR., Primary Examiner.

and completely separating said shell and concrete from 1 J. L. RIDGILL, Assistant Examinen 

1. AN ANCHORING DEVICE FOR USE IN CONCRETE CONSTRUCTION COMPRISING: A FRUSTO-CONICAL METAL SHELL MEMBER HAVING A LARGE OPEN END AND A SMALL OPEN END, A SOCKET MEMBER WITHIN SAID MEMBER ADJACENT SAID SMALL END HAVING AN INTERNALLY THREADED OPENING IN ALIGNMENT WITH SAID LARGE AND SMALL OPEN ENDS AND DIRECTED TOWARD AND SUBSTANTIALLY EVEN WITH SAID SMALL END, A COVER PLATE JOINED TO SAID SOCKET MEMBER OVER SAID OPENING AT THE END DIRECTED TOWARD SAID LARGE OPEN END OF SAID SHELL MEMBER, AN ELASTOMER MATERIAL COVERING SAID SOCKET MEMBER AND SAID COVER PLATE AND PLUGGING SAID LARGE OPEN END AND INTERPOSED BETWEEN SAID SHELL MEMBER AND SAID COVER PLATE AND SOCKET MEMBER, AND A REMOVABLE EXTERNAL PLATE MEMBER HAVING A CENTRAL THREADED PLUG ENGAGEABLE WITH THE INTERNAL THREADS OF SAID SOCKET MEMBER. 